Centrifugal pump, blower, compressor, and the like.



E. SCHNEDER.

BLOWER, COMPRESSOR, AND `THE LIKE. APPLICATION FILED SBPT.9,1913.

' GENTRIFUGAL PUMP,l

Patented Jan. 26, 1915.

2 SHEETS-SHEET l.

E. SOlIIWSIDERi GENTRIFUGAL PUMP, BLoWER, COMPRESSOR, AND THB LIKE.

APPLICATION FILED SEPT, 9,1913.

Patented Jan. 26, '19%.

2 SHBETS-SHI5BT maestro.

nm SCHNEIDER, orner/reune, entraran?.

CENTBHUGAB PUMPBLOWER, COMPRESSOR, AND TEE Limi.

Specification of Letters Patent.

Patented u" 236,

Y Application led September 9, 191.3. Serial No. 788,824.

To all whom it may concern Be it known that I, EMIL SCHNEIDER, a citizen of Switzerland, residing at Langerkamp 2, Hamburg, Ger-many, have invented certain new "and useful Improvements Yin Centrifugal Pumps, Blowers, Compressors',

and the like, of'which the following is a;

specification.

This invention relates to centrifugal pumps, blowers, compressors or the like and has for its object to enable the individual disks or units for example in a set of centrif'ugal pumps of known type, to be connected or combined at will while in operation, a thing which is not possible at present. In this Way a set of centrifugal pumps with the same number of revolutions and an approximately constant consumptionv of v power would be able to ovecome heads of for instance 20 to 80 meters with a correspondingly modified output.

:This is rendered possible according to the present invention by means of a new switch apparatus which `allows. various connections or combinations of the disks or units to be i effected.

This invention also comprises Va novel construction of the casing of the pump, blower or compressor. l

The accompanying draw'ings show the invention as applied to a four stage pump with four different connections.

'Figure 1 is a side elevation of the pump.

.v Fig. 2 is an end elevation of the same. Fig.

disks connected inl series, work in parallel.

Thedisks are connected in series, while the fourth stage works independently.`

Thusthree stages work in parallel with one stage, that is to say in this arrangement there 'aretwo equal outputs or deliveries but diierent,A pressures. are connected in series. 1

The operation in the above named foul cases is as' lfollows :In case 1 the four pump each two stages are in series.

4. All the four disks disks draw water, .each independently, through the branches g, g2, g3, gt, and ft2, 72,3, It* of the switch apparatus (F and 5) the pipes g', g2, g3, gi' (Figs. i, :2, and 5) and through the pump branches al", d2, d3, di, each vpump forcing the water through the pump branches e', e2, e3, pipes r', r2, r3, r1, into the branches 2", i, 4 of the switch apparatus from which 1t iows through the branches l', Z2, Z3, Z4 into the discharge piping. l/Vith this arrangement the pump delivers the maximum tty of water that it is capable of delivering,

while the pressure is equal to that produced by one stagef The water is guided through the switch apparatus in the saine way for each pump, namely as shown in Fig. 5 in which the effective cross-section of the switch body is clearly indicated.

` In case 2, the pump disks'of the rst and third stages draw water, each independu ently, through the branches g and g3 and it" and It, pipes q and g3 and pump branches Il .and cl3, and discharge the said water through the pump branches e `and e3 pipes 7" and r into the branches e" and a of the switch apparatus, in order to supply the water through the branches 7: and ki* and y the connecting pipes s and s to the pump branches f2 and f4 and thus to the disks two and four under pressure. The disks two and four discharge water through the pump branches e2 anJL et, pipes 112 and ani "he switch apparatus branches ai .l

and Z4 into the discharge piping. tity of water delivered with this connu. l. or arrangement' is half of that in the conu nection 1, while the pressure is double, as

guided in the switchbody in the planes of the branches g and g3 according to ign and with respect to the branches g2 and g* according to Fig. 6.

In case 3 the pump disks of the-.Erst and fourth stage draw water, each independently, through the branches g and g4, and 7L and h4, pipes Q and g4 and the pump branches d and d* and 'force through. the pump 'branches e and et, pipes ri and ift into the branches e and 4' of the switch apparatus. The water of the :tourthv stage is guided from ythe branch 4 through the The water is branch Zgx direct into the discharge 'pipingVA (Fig. 5) while the water of the .tiret st.. guided froznthe larauch e to s' branch f2 et he serene stage, to'

1. sie

disk of which it is supplied under pressure. The second dislr conveys the water through the pump branch. c2 and pipe r2 to the switch apparatus branch 2, `from 2 through if (Fig. 4:) and st to the pump brauch' fr. A

.From here the vater passes the third disk in order to flow from the same th rough c3, r3, i to l (Vig. (3') and 'further in the direction of pressure. The quantity delivered is here half of that in the oase l, while the pressure at the branch Z3 is treble the individual stage 7 pressure, and at the branch Z* the pressure is the simple stage presure. ln the first place 'the water is guided on the switch apparatus in .the planes ot the branches g and g2 as shown in Fig. LL, but subsequently the connection between the branches g2 endif-is not utilized. In the switching plane g3 the operative connections are shown in Fig. C. For the fourth pump stage, which works singly, Fig. indicates the arrangement.

ln the case et i, the pump disk of thev first stage draws water through the branches g and li', pipe f/ and pump branch d', and forces this waterthrough' the branch c and the pipe r toward the switch apparatus branch t" and thence to the branch c (Fig. 4), then through the pipe s toward f2 and the second disk, to which it is supplied under pressure. IThis disk increases the pressure and conveys the water through the pump branch e2, branches 2, and k2 (Fig. 7) and pipe s2, as well as the pump branch f3, to the third disk. After further increase of pressure in the third stage the water is forced by that disk through the pump branch e3, pipe r3 to the branches a and 7c (Fig. 7) and then through the pipe .i3 toward the branch f4 and the fourth disk, -The pressure in the fourth stage increases in the same manner, whereupon the Water flows through the pump et, pipe r, branches t" and Z" Fig. 6) into the discharge piping. The. quantity delivered in this connection is a quaipter oi that delivered in the arrangement 1 while the pressure is equal to a quadruple stage pressure. lThe water is guided in switch apparatus in the plane y according to Fig. Il, planes g2 and g3 according to Fig. 4, but Without the use of the conncction between the branches g2 and g3 and h2 and h3 as well as in the switch plane g* of the last stage according to rig. c.

For obtaining one of the four connections, tlie switch body or piston pis longitudinally moved manipulating the hand wheel 7; which is operatively connected to the rod p of the piston 7). The cross-sections marked m, n, o, t, corresponding to l"i fl, 5 6 and 7 become consecutively operative. As the connections can be obtained' with a single switch. body, the different p0- sitions can be obtained without loss of time vided withthe same'number of connection planes provided with branches and groups of guide cross sections on the switch body, there are pump stages. F or each switch plane are required as vmany switch cross Sections m, n, o, z5, or branch connecting members, as there are connections to be made. i

The invention can be used-also for rotary stage pumps, such as blowers,` compressors, ctc. Mhreovcr, desired, thc whole conncctiondcvice can be built in one with the pump, the pipes being replaced by conduits. The pump or blower or compressor casings ditfcr 'in construction from those .hitherto lmowruby each stage beingprovided with one discharge branch e and all, except` the first, with two suction branchesfd and f or correspondingconduits.

`l. In a centrifugal pump the combination of a plurality of pump unitseach having a branch for a suction pipe connection and a branch-for adelivery pipe connection and each except the .irstor endmost having also a second branch-fora suction pipe connection, a cylindrical 'casing having a plurality' of groups of branches :tor pipe connections disposed along it, a single piston longitudinally movable within the casing and comprising a plurality of groups of branch connectingA members each of which groups is .positioned in the casing so as to coperate with and control' the flow of fluid through one of the Agroups of branches, means for moving the piston, and pipes connecting the pump branches and the casing branches as set torth.

2. In a centrifugal pumpv the combina tion of a plurality of pump units each having a branch for a suction pipeconnection and a branchfor a delivery pipe connection and each except the first o1'- endmost having also a second branch for a suction pipe connection, a cylindrical casing having a plurality of' groups of branches for pipe connections disposed along it all the branches in any one group being positioned so thatthey lie in a plane normal to the axis of the cylinder, a single piston longitudinally movable ywithinjthe casing and comprising a plurality of groups of branch connecting members each member of each group operating when positioned in the plane of a group of casing branches to control and directthelowof Huid through that group of branches, means for moving the piston, and pipes connecting the pump branches and the casing branches as set forth.

3. In a centrifugal pump the combination of a plurality of pump units each havi'io ing -a branch for a suction pipe connection and a branch for a delivery pipe connection and each except the lirst or; endmost having also a second branch for a suction pipe connection, a cylindrical casing having a plurality of groups of branches for pipe con nections disposed along it all the branches in any one they lie in a plane normal to the axis of the cylinder, a single piston longitudinally movable within the casmg and comprising group being positioned so that' the plane of a group of casing branches op crates to control and direct the flow of fluid through so effect a coupling of the pump units in various ways, means for moving the piston, and pipes connecting the pump branches and the casing branches as set forth.

In testimony whereof have hereunto signed my namefthis 25th day of August 1913 in the presence of two subscribing witnesses.

EMIL soHNEiDER, im.

Witnesses:

ERNEST H. L. MUMMENHOFF, IDA CHRIST. HAFERMANN.

that group of branches'and 

